Answer:
(x + 2)² = 7
Step-by-step explanation:
We have to complete the square in the given equation
3x² + 12x = 9
3x² + 12x - 9 = 0
3[x² + 4x -3] = 0
3[x² + 2(2x) + 4 - 4 - 3] = 0
3[x² + 2(2x) + 4] - 3 × 7 = 0
3[x² + 2]² - 21 = 0
(x + 2)² = = 7
Therefore, the square form of the equation is (x + 2)² = 7
Hope this helps (:
It would take him 30 seconds to write a full page
Typically if it is a linear function then it doesn't matter. However if it is a quadratic, cubic, and so on and so forth....(
) you may want to used the distance formula if you are not given any other points (with the exception of the vertex, asymptote or roots... etc).
C should be correct since AB and XY are in the same places
<span>A store display rotates 40 times every half hour i.e 30 minutes
Thus, by simple calcultion, we say,
Therefore, the store display rotates 80 times in 1 hour i.e. 60 minutes
Now,
Thus, the strore display will rotate 80*4 = 320 times in 4 hours
therefore, the answer is 320 times in 4 hours</span>
